(19)

(11)

EP 3 204 600 A1

(12)

(43) Date of publication: 16.08.2017 Bulletin 2017/33 (21) Application number: 15784869.8 (22) Date of filing: 08.10.2015

(51) International Patent Classification (IPC):  E21B 43/08(2006.01) E21B 43/14(2006.01) E21B 43/12(2006.01) E21B 43/16(2006.01) (86) International application number: PCT/US2015/054757 (87) International publication number: WO 2016/057830 (14.04.2016 Gazette 2016/15)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA (30) Priority: 10.10.2014 US 201414511637 (71) Applicant: Saudi Arabian Oil Company Dhahran 31311 (SA)	(72) Inventor: NOUI-MEHIDI, Mohamed Nabil Dhahran 31311 (SA) (74) Representative: Dauncey, Mark Peter  Marks & Clerk LLP 1 New York Street Manchester M1 4HD Manchester M1 4HD (GB)